"Double" - means the fabric is brushed on both sides"Single" - means fabric is brushed on one side, smooth on the other. 96% POLYESTER / 4% SPANDEX58"/60"" wide Medium weight4 - WAY stretchWorks very well for dresses, leggings, tops, etc.Fabric is sold by the yard. CARE: Wash on cold, tumble dry*PLEASE NOTE: as we try to keep solid colors in stock, sometimes we must get a color from another supplier- this means colors can vary slightly so if you are re-ordering a solid please keep that in mind.